By now it's not possible to delete DB Collections, which can end up in having a huge amount of DB's which might not be used. In my opinion create and drop DB should be the first and basic features.
Same applies to editing and modifying DB's. Currently I can't delete a column in live DB's. Deleting them on Sandbox and syncing modifications over to Live has no effect.
Also copying DB's would be a huge time saver.
As long as these features aren't implemented, imho offering DB's as an added value missing basic features is senseless.